Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] ! Boolean operator 2nd 3rd ! variable !! to reexecute the previous event !$ last word of the previous event # comment 2nd # prompt # variable #! to choose a script shell #define C preprocessor directive 2nd #include C preprocessor directive $ in regular expressions $ in variable name $! variable $# variable $$ variable 2nd $(...) [See Command, substitution.] $* variable $0 variable $? variable $@ variable 2nd ${}, expand variable % job number 2nd & background 2nd 3rd 4th 5th 6th 7th & bitwise operator 2nd & in replacement string 2nd && Boolean operator 2nd 3rd 4th 5th 6th ((...)) [See Arithmetic evaluation.] () command grouping () in shell functions * in regular expressions * special character */ C comment + in full regular expressions . (dot) builtin 2nd 3rd 4th . directory 2nd 3rd . in regular expressions .. directory 2nd 3rd ./ to execute a file in the working directory 2nd .a filename extension 2nd .autofsck file .bash_history file .bash_login file .bash_logout file .bash_profile file 2nd 3rd .bashrc file 2nd 3rd .bmp filename extension .bz2 filename extension 2nd .C filename extension .c filename extension 2nd 3rd 4th .c++ filename extension .cc filename extension .conf filename extension .config file .cpp filename extension .cshrc file .cxx filename extension .db filename extension 2nd .f filename extension .forward file 2nd .gif filename extension .gz filename extension 2nd .h filename extension 2nd .htaccess file 2nd .htm filename extension .html filename extension 2nd .htpasswd file .inputrc file .jpeg filename extension 2nd .jpg filename extension 2nd .l filename extension .login file .logout file .m filename extension .netrc file .o filename extension 2nd 3rd 4th .pdf filename extension .pgpkey file .php filename extension .plan file .ppd filename extension .profile file 2nd 3rd .project file .ps filename extension .repo filename extension .rhosts file 2nd .rpmnew filename extension .s filename extension 2nd .sh filename extension .shtml filename extension .so filename extension 2nd .ssh directory .tar.bz2 filename extension .tar.gz filename extension .tar.Z filename extension 2nd .tbz filename extension .tgz filename extension .tif filename extension 2nd .tiff filename extension 2nd .toprc file .torrent file .txt filename extension 2nd .tz filename extension .var filename extension .y filename extension .Z filename extension 2nd / directory (root) 2nd 3rd /* C comment /bin false file /boot grub/grub.conf file 2nd location partition 2nd 3rd /dev 2nd 3rd nst0 file null file 2nd 3rd 4th 5th 6th pts file random file rmt/0 file special files st0 file tty file urandom file zero file /dev directory /etc aliases file 2nd 3rd anacrontab file at.allow file at.deny file auto_master file bashrc file 2nd cron.* directories cron.allow file cron.d directory cron.deny file crontab file cups directory defaultrouter file dhclient.conf file dhcpd.conf file dovecot.conf file dumpdates file 2nd exports file 2nd 3rd fstab file 2nd 3rd 4th 5th group file 2nd 3rd 4th grub.conf file 2nd hosts file 2nd 3rd 4th 5th hosts.allow file 2nd 3rd hosts.deny file 2nd 3rd hosts.equiv file 2nd httpd directory inittab file 2nd 3rd 4th 5th issue file 2nd login.defs file 2nd logrotate.conf file logrotate.d directory mail directory 2nd motd file 2nd 3rd 4th 5th mtab file named.conf file 2nd 3rd netgroup file nologin.txt file 2nd nsswitch.conf file 2nd 3rd 4th 5th 6th ntp.conf file opt directory pam.conf file pam.d directory 2nd 3rd 4th passwd file 2nd 3rd 4th 5th 6th 7th 8th 9th printcap file profile file 2nd 3rd 4th protocols file 2nd rc.d directory hierarchy 2nd init.d: about init.d: independent services init.d: init scripts init.d: kudzu file rc file rc.local file rc.sysinit file 2nd rcn.d directory resolv.conf file 2nd 3rd rndc.conf file rndc.key file rpc file 2nd securetty file security/access.conf file selinux/config file services file 2nd 3rd shadow file 2nd share/magic file shells file skel directory ssh directory sudoers file sysconfig httpd file 2nd hwconf file iptables file 2nd 3rd iptables-config file named file 2nd network file 2nd rhn/up2date file selinux file syslog file yppasswdd file sysctl.conf file syslog.conf file 2nd termcap file vsftpd chroot_list file ftpusers file user_list file X11 xorg file xinetd.conf file 2nd xinetd.d directory 2nd yp.conf file ypserv.conf file yum.conf file yum.repos.d directory 2nd /home directory /home partition /lib gcc and modules directory 2nd security directory 2nd /lost+found directory /mnt directory /opt directory 2nd 3rd /proc contents filesystem 2nd fs/nfs file mounts file sys file /root anaconda-ks.cfg file install.log file /sbin Superuser commands /sys directory /tmp directory 2nd 3rd /usr bin directory doc directory 2nd games directory include C preprocessor info directory lib directory gcc shared libraries terminfo directory local 2nd partition man directory partition pub/ascii file sbin daemons Superuser commands share magic file src directory 2nd /var ftp directory lib/nfs/xtab file 2nd log 2nd 3rd disk usage lastlog file maillog file messages file 2nd 3rd 4th 5th 6th 7th 8th secure file 2nd 3rd vsftpd.log file wtmp file 2nd log directory mail directory named directory 2nd partition spool disk usage mail directory mqueue file tmp directory www Apache files html directory 2nd 3rd a Boolean operator '...' [See Command, substitution.] 0< redirect standard input 100BaseT cable 10Base2 cable 10BaseT cable 1> redirect standard output 2> redirect standard error 3-DES encryption 802.11 : (null) builtin 2nd 3rd := assign default value := substitute default value :? display error message ; command separator < redirect standard input 2nd 3rd <& duplicate input file descriptor << Here document 2nd > redirect standard output 2nd 3rd 4th 5th >& duplicate output file descriptor 2nd >> append standard output 2nd ? in full regular expressions ? special character @ in a network address 2nd 3rd @ variable @ with email [[...]] [See also Conditional expression.] [[...]] builtin [] character class 2nd 3rd \ escape character 2nd 3rd \( in regular expressions \) in regular expressions \n in replacement strings ^ bitwise operator ^ in regular expressions ^ quick substitution character { expansion { in a shell function | bitwise operator | Boolean operator | in full regular expressions | pipe 2nd 3rd || Boolean operator 2nd 3rd 4th 5th } expansion } in a shell function ~ (tilde) expansion 2nd 3rd ~ home directory [See also Home directory.] ~ in pathnames |